qmk_firmware/keyboards/idobao/montex/v2/config.h

// Copyright 2022 IBNobody (@IBNobody)
// SPDX-License-Identifier: GPL-2.0-or-later

#pragma once

#if defined(RGB_MATRIX_ENABLE)
    #ifndef ID27_DISABLE_UNDERGLOW
        #define RGB_MATRIX_LED_COUNT 31  // The number of LEDs connected
    #else
        #define RGB_MATRIX_LED_COUNT 27  // -4 disabled underglow LEDs
    #endif
#endif  // RGB_MATRIX_ENABLE

/* -----------------------
 * Feature disable options
 *  These options are also useful to firmware size reduction.
 * ----------------------- */

/* disable debug print */
// #define NO_DEBUG

/* disable print */
// #define NO_PRINT

/* disable action features */
// #define NO_ACTION_LAYER
// #define NO_ACTION_TAPPING
// #define NO_ACTION_ONESHOT